Rubik's cube is considered a green toy.

Rubik's cube is considered a green toy. No batteries require just hand movements.
It's complicated that in a sense it will take time to solve the puzzle.
It just turned 30 years old created by Erno Rubik. His tinkering with a puzzle lead to the brain twister toy, called the Rubik's Cube. This toy will help keep any kid
occupied for several hours or more. Green is this toy for any kid looking for a puzzle to solve.

Related articles by Zemanta

• Nokia-based Rubik's Cube solver (makezine.com)
• Meet the Rubik's Slide: New Shape, New Frustrations [We Love Toys] (gizmodo.com)
• Rubik's Cube Returns With a Touch Screen and a Higher Price Tag CubeStormer Makes This Blogger Feel Even More Inadequate On Valentine's Day [Rubik's Cube] (gizmodo.com)
• CubeStormer Robot Solves Heavily Scrambled Rubik's Cube in Seconds (geeksaresexy.net)
• Rubik's Slide set to thrill puzzle fans (ubergizmo.com)